Should I file a bug? If so, any guidelines what to do? --- <exception caught here> --- File "/home/autobahn/python/lib/python2.7/site-packages/Twisted-11.1.0_r33225-py2.7-freebsd-8.2-RELEASE-p3-i386.egg/twisted/internet/defer.py", line 545, in _runCallbacks current.result = callback(current.result, *args, **kw) File "/home/autobahn/python/lib/python2.7/site-packages/Twisted-11.1.0_r33225-py2.7-freebsd-8.2-RELEASE-p3-i386.egg/twisted/protocols/ftp.py", line 907, in gotListing self.dtpInstance.sendListResponse(name, attrs) File "/home/autobahn/python/lib/python2.7/site-packages/Twisted-11.1.0_r33225-py2.7-freebsd-8.2-RELEASE-p3-i386.egg/twisted/protocols/ftp.py", line 421, in sendListResponse self.sendLine(self._formatOneListResponse(name, *response)) File "/home/autobahn/python/lib/python2.7/site-packages/Twisted-11.1.0_r33225-py2.7-freebsd-8.2-RELEASE-p3-i386.egg/twisted/protocols/ftp.py", line 385, in sendLine self.transport.write(line + '\r\n') File "/home/autobahn/python/lib/python2.7/site-packages/Twisted-11.1.0_r33225-py2.7-freebsd-8.2-RELEASE-p3-i386.egg/twisted/internet/_newtls.py", line 180, in write FileDescriptor.write(self, bytes) File "/home/autobahn/python/lib/python2.7/site-packages/Twisted-11.1.0_r33225-py2.7-freebsd-8.2-RELEASE-p3-i386.egg/twisted/internet/abstract.py", line 300, in write raise TypeError("Data must not be unicode") exceptions.TypeError: Data must not be unicode [autobahn@autobahnhub ~/Twisted]$ svn diff twisted/protocols/ftp.py Index: twisted/protocols/ftp.py =================================================================== --- twisted/protocols/ftp.py (revision 33225) +++ twisted/protocols/ftp.py (working copy) @@ -382,7 +382,7 @@ self._onConnLost.callback(None) def sendLine(self, line): - self.transport.write(line + '\r\n') + self.transport.write(str(line) + '\r\n') def _formatOneListResponse(self, name, size, directory, permissions, hardlinks, modified, owner, group):